|
Search: id:A138042
|
|
| |
|
| 2, 7, 13, 19, 49, 69, 116, 182, 206, 225, 229, 236, 253, 265, 288, 315, 324, 352, 379, 390, 394, 435, 492, 497, 542, 551, 567, 625, 643, 658, 718, 754, 794, 920, 930, 935, 958, 966, 988, 1025, 1032, 1085, 1101, 1128, 1155, 1171, 1173, 1225, 1235, 1249
(list; graph; listen)
|
|
|
OFFSET
|
1,1
|
|
|
COMMENT
|
Numbers n such that prime(n)=2*prime(n+2)-prime(n+3).
|
|
LINKS
|
Zak Seidov, Table of n, a(n) for n = 1..1192, a(n)<50000.
|
|
FORMULA
|
A138042(n)=A066495(n)+2.
|
|
EXAMPLE
|
n=2: {prime(n), 2*prime(n+2)-prime(n+3)}={3,2*7-11},
n=7: {prime(7), 2*prime(9)-prime(10)}={17,2*23-29},
n=13: {prime(13), 2*prime(15)-prime(16)}={41,2*47-53},
n=19: {prime(19), 2*prime(21)-prime(22)}={67,2*73-79}.
|
|
MATHEMATICA
|
Do[If[Prime[n]==2Prime[n+2]-Prime[n+3], Print[n]], {n, 1, 50000}]
|
|
CROSSREFS
|
Cf. A066495, A096379.
Sequence in context: A118755 A106011 A045375 this_sequence A053977 A079381 A079382
Adjacent sequences: A138039 A138040 A138041 this_sequence A138043 A138044 A138045
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
Zak Seidov (zakseidov(AT)yahoo.com), Mar 02 2008
|
|
|
Search completed in 0.002 seconds
|
